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An Extension of the Guided Wave M‐Component Model Taking Into Account the Presence of a Tall Strike Object.

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Title: An Extension of the Guided Wave M‐Component Model Taking Into Account the Presence of a Tall Strike Object.
Authors: Li, Quanxin1,2, Rachidi, Farhad2 farhad.rachidi@epfl.ch, Rubinstein, Marcos3, Wang, Jianguo1 wjg@whu.edu.cn, Azadifar, Mohammad3, Cai, Li1, Wang, Junlin1, Zhou, Mi1, Fan, Yadong1
Source: Journal of Geophysical Research. Atmospheres. 9/27/2021, Vol. 126 Issue 18, p1-15. 15p.
Subject Terms: Electric lines, Electric fields, Superimposed coding, Electromagnetic compatibility, Radio interference
Abstract: We present in this paper an extension of the guided‐wave M‐component model of Rakov et al. considering the presence of a vertically elevated strike object. The tall object is represented as a lossless, uniform transmission line. Expressions for the current distribution along the channel and along the strike object are derived. Simulation results for the electric field at close (100 m), intermediate (15 km), and far (100 km) distance ranges are presented, considering fast and slow M‐component currents. The results show that, for very tall structures and fast M‐component waves, the presence of a tall strike object can result in a sharp peak superimposed on the M‐component electric field at intermediate and far distance ranges (e.g., 15 and 100 km). At close distances, the electric field of a fast M‐component is characterized by an initial negative excursion followed by a polarity change. It is shown that the presence of the tower results in a decrease of the negative initial excursion of the field. For slow M‐component waveforms or for moderately tall structures, the presence of the tall strike object can be disregarded in the M‐component field calculations. A discussion on the influence of the M‐wave channel height and velocity on the electric fields for fast M‐component currents is also presented. The study suggests a noticeable effect of the M‐wave velocity on the electric fields at all distance ranges. The variations of the wave velocity and channel length affect the time of appearance of the superimposed sharp peak on the electric fields. However, the sharp peak magnitude, which is due to the presence of the tower, is independent of the channel length and wave velocity. It is determined by the injected current and the reflection coefficients from the ground and tower top. Key Points: We propose an extension of the guided‐wave M‐component model of Rakov et al. considering the presence of a vertically elevated strike objectFor very tall structures and fast M‐component waves, the presence of a tall strike object can result in a sharp peak superimposed on the M‐component electric field at intermediate and far distance rangesThe superimposed sharp peak amplitude is independent of the channel length and the wave velocity, while its arrival time is affected by the channel length and the wave velocity [ABSTRACT FROM AUTHOR]
Copyright of Journal of Geophysical Research. Atmospheres is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: An Extension of the Guided Wave M‐Component Model Taking Into Account the Presence of a Tall Strike Object.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Quanxin%22">Li, Quanxin</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Rachidi%2C+Farhad%22">Rachidi, Farhad</searchLink><relatesTo>2</relatesTo><i> farhad.rachidi@epfl.ch</i><br /><searchLink fieldCode="AR" term="%22Rubinstein%2C+Marcos%22">Rubinstein, Marcos</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Jianguo%22">Wang, Jianguo</searchLink><relatesTo>1</relatesTo><i> wjg@whu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Azadifar%2C+Mohammad%22">Azadifar, Mohammad</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Cai%2C+Li%22">Cai, Li</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Junlin%22">Wang, Junlin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhou%2C+Mi%22">Zhou, Mi</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fan%2C+Yadong%22">Fan, Yadong</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Atmospheres%22">Journal of Geophysical Research. Atmospheres</searchLink>. 9/27/2021, Vol. 126 Issue 18, p1-15. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Electric+lines%22">Electric lines</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+fields%22">Electric fields</searchLink><br /><searchLink fieldCode="DE" term="%22Superimposed+coding%22">Superimposed coding</searchLink><br /><searchLink fieldCode="DE" term="%22Electromagnetic+compatibility%22">Electromagnetic compatibility</searchLink><br /><searchLink fieldCode="DE" term="%22Radio+interference%22">Radio interference</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We present in this paper an extension of the guided‐wave M‐component model of Rakov et al. considering the presence of a vertically elevated strike object. The tall object is represented as a lossless, uniform transmission line. Expressions for the current distribution along the channel and along the strike object are derived. Simulation results for the electric field at close (100 m), intermediate (15 km), and far (100 km) distance ranges are presented, considering fast and slow M‐component currents. The results show that, for very tall structures and fast M‐component waves, the presence of a tall strike object can result in a sharp peak superimposed on the M‐component electric field at intermediate and far distance ranges (e.g., 15 and 100 km). At close distances, the electric field of a fast M‐component is characterized by an initial negative excursion followed by a polarity change. It is shown that the presence of the tower results in a decrease of the negative initial excursion of the field. For slow M‐component waveforms or for moderately tall structures, the presence of the tall strike object can be disregarded in the M‐component field calculations. A discussion on the influence of the M‐wave channel height and velocity on the electric fields for fast M‐component currents is also presented. The study suggests a noticeable effect of the M‐wave velocity on the electric fields at all distance ranges. The variations of the wave velocity and channel length affect the time of appearance of the superimposed sharp peak on the electric fields. However, the sharp peak magnitude, which is due to the presence of the tower, is independent of the channel length and wave velocity. It is determined by the injected current and the reflection coefficients from the ground and tower top. Key Points: We propose an extension of the guided‐wave M‐component model of Rakov et al. considering the presence of a vertically elevated strike objectFor very tall structures and fast M‐component waves, the presence of a tall strike object can result in a sharp peak superimposed on the M‐component electric field at intermediate and far distance rangesThe superimposed sharp peak amplitude is independent of the channel length and the wave velocity, while its arrival time is affected by the channel length and the wave velocity [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Geophysical Research. Atmospheres is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1029/2021JD035121
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 1
    Subjects:
      – SubjectFull: Electric lines
        Type: general
      – SubjectFull: Electric fields
        Type: general
      – SubjectFull: Superimposed coding
        Type: general
      – SubjectFull: Electromagnetic compatibility
        Type: general
      – SubjectFull: Radio interference
        Type: general
    Titles:
      – TitleFull: An Extension of the Guided Wave M‐Component Model Taking Into Account the Presence of a Tall Strike Object.
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            – D: 27
              M: 09
              Text: 9/27/2021
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              Y: 2021
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